Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 5, NWS New Orleans, LA

August 6, 2002Saint Tammany Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 6, 2002, 4:29 AM CDT for Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 6, 2002, 4:29 AM CDT (09:29 UTC)
Expired: Aug 6, 2002, 6:30 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Saint Tammany Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.5 hours before the alert went out and 51 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1508 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KLIX 060929
FFWNEW
LAC103-117-061130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
425 AM CDT TUE AUG 6 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA
  SOUTHERN WASHINGTON PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF...FRANKLINTON...BOGALUSA

* UNTIL 630 AM CDT

* AT 423 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY 
  HEAVY RAIN FROM FOLSOM TO FRANKLINTON TO ENON...OR ABOUT 11 MILES
  NORTHEAST OF COVINGTON...MOVING NORTHEAST AT 20 MPH. THE FOLSOM 
  AREA HAS BEEN EXPERIENCING REPEAT THUNDERSTORMS THROUGHOUT THE 
  NIGHT. 

* OTHER LOCATIONS IN THE WARNING INCLUDE FOLSOM...BLOND...ENON AND 
  ISABEL 

A RIVER FLOOD WARNING FOR THE BOGUE FALAYA RIVER HAS ALSO BEEN 
ISSUED.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABONDONED. MOVE TO HIGHER
GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 5:30 AM CDT	Tornado Warning	LIX	Saint Tammany	30 min
Aug 6, 6:30 AM CDT	Flash Flood Warning	LIX	Saint Tammany	2 hr
Aug 6, 6:31 AM CDT	Flash Flood Warning	LIX	Saint Tammany	119 min
Aug 6, 9:36 AM CDT	Flash Flood Warning	LIX	Saint Tammany	114 min
Aug 6, 1:31 PM CDT	Flash Flood Warning	LIX	East Feliciana, Saint Helena	119 min

Nearby

Flash Flood Warnings in Louisiana, 2002 Every flash flood warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.